import axios, { type AxiosResponse, type InternalAxiosRequestConfig } from 'axios'
import cache from '@/plugins/cache'
import { HttpStatus } from '@/enums/RespEnum'
import errorCode from '@/utils/errorCode'
import { ElMessage, ElMessageBox, ElNotification } from 'element-plus';

const tansParams = (params: any) => {
  let result = ''
  for (const propName of Object.keys(params)) {
    const value = params[propName]
    const part = encodeURIComponent(propName) + '='
    if (value !== null && value !== '' && typeof value !== 'undefined') {
      if (typeof value === 'object') {
        for (const key of Object.keys(value)) {
          if (value[key] !== null && value[key] !== '' && typeof value[key] !== 'undefined') {
            const params = propName + '[' + key + ']'
            const subPart = encodeURIComponent(params) + '='
            result += subPart + encodeURIComponent(value[key]) + '&'
          }
        }
      } else {
        result += part + encodeURIComponent(value) + '&'
      }
    }
  }
  return result
}

// 是否显示重新登录
export const isReLogin = { show: false }

// 创建 axios 实例
const service = axios.create({
  baseURL: import.meta.env.VITE_APP_BASE_API,
  timeout: 50000,
})
service.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'

// 请求拦截器
service.interceptors.request.use(
  (config: InternalAxiosRequestConfig) => {

    const isToken = config.headers?.isToken === false
    // 是否需要防止数据重复提交
    const isRepeatSubmit = config.headers?.repeatSubmit === false
    // 是否需要加密
    const isEncrypt = config.headers?.isEncrypt === 'true'

    
    // get请求映射params参数
    if (config.method === 'get' && config.params) {
      let url = config.url + '?' + tansParams(config.params)
      url = url.slice(0, -1)
      config.params = {}
      config.url = url
    }

    if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
      const requestObj = {
        url: config.url,
        data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
        time: new Date().getTime(),
      }
      const sessionObj = cache.session.getJSON('sessionObj')
      if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
        cache.session.setJSON('sessionObj', requestObj)
      } else {
        const s_url = sessionObj.url // 请求地址
        const s_data = sessionObj.data // 请求数据
        const s_time = sessionObj.time // 请求时间
        const interval = 500 // 间隔时间(ms)，小于此时间视为重复提交
        if (
          s_data === requestObj.data &&
          requestObj.time - s_time < interval &&
          s_url === requestObj.url
        ) {
          const message = '数据正在处理，请勿重复提交'
          console.warn(`[${s_url}]: ` + message)
          return Promise.reject(new Error(message))
        } else {
          cache.session.setJSON('sessionObj', requestObj)
        }
      }
    }
    // FormData数据去请求头Content-Type
    if (config.data instanceof FormData) {
      delete config.headers['Content-Type']
    }
    return config
  },
  (error: any) => {
    return Promise.reject(error)
  },
)

// 响应拦截器
service.interceptors.response.use(
  (res: AxiosResponse) => {
    // 未设置状态码则默认成功状态
    const code = res.data.code || HttpStatus.SUCCESS
    // 获取错误信息
    const msg = errorCode[code] || res.data.msg || errorCode['default']
    // 二进制数据则直接返回
    if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
      return res.data
    }
    if (code === 401) {
      // prettier-ignore
      if (!isReLogin.show) {
        isReLogin.show = true;
        ElMessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', {
          confirmButtonText: '重新登录',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          isReLogin.show = false;
        }).catch(() => {
          isReLogin.show = false;
        });
      }
      return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
    } else if (code === HttpStatus.SERVER_ERROR) {
      ElMessage({ message: msg, type: 'error' });
      return Promise.reject(new Error('服务器异常，请稍后再试'))
    } else if (code === HttpStatus.BAD_GATEWAY) {
      ElMessage({ message: '系统更新维护中，请稍后再试', type: 'error' })
      return Promise.reject(new Error('系统更新维护中，请稍后再试'))
    } else if (code === HttpStatus.WARN) {
      ElMessage({ message: msg, type: 'warning' })
      return Promise.reject(new Error(msg))
    } else if (code !== HttpStatus.SUCCESS) {
      ElNotification({ title: msg, type: code == HttpStatus.SERVER_ERROR ? 'error' : 'warning' })
      return Promise.reject('error')
    } else {
      return Promise.resolve(res.data)
    }
  },
  (error: any) => {
    const status = error?.response?.status
    let { message = '未知错误，请稍后再试' } = error
    if (status === 502) {
      message = '系统更新维护中，请稍后再试'
      window.location.href = `${window.location.origin}/502`
    } else if (message == 'Network Error') {
      message = '后端接口连接异常'
    } else if (message.includes('timeout')) {
      message = '系统接口请求超时'
    } else if (message.includes('Request failed with status code')) {
      message = '系统接口' + message.substr(message.length - 3) + '异常'
    }
    if (message === 'canceled') {
      return
    }
    ElMessage({ message: message, type: 'error', duration: 5 * 1000, grouping: true });
    return Promise.reject(error)
  },
)
// 导出 axios 实例
export default service
